Division of Infectious Diseases and Geographic Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA

Correspondence to Jeffrey Tessier, MD, FACP, FIDSA, Division of Infectious Diseases and Geographic Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390-9113, USA. Tel: +214 648 5563; e-mail: [email protected]